Double tilting arbor saw



Jan. 15, 1935. G. T. JOHNSON 1,988,243

DOUBLE TILTING ARBOR sAw Filed Aug. 5l, 1932 2 Sheets-Sheet 1 Jan. 15,1935. G. T. JOHNSON DOUBLE TILTING ARBOR SAW 1932 2 Sheets-Sheet 2 FiledAug. 31,

0 faz/ef IBL which the secondary lfratreflZtilts.` l

Patented Jan. l5, 1935 l A f'hezfrpurposevaof `invention is torprovi'dea dwblexarbor saw. tbenchoi d'mproved construce tion :and operationuiin`whichL :the Work-'supporte ing ftlilejreinainstin farlhorizontalpositioniat all mes,.=and t.the isa-wsgwhicham separately vdriven by'directe/ connected. felec'tr'ic motors, `:are

other. more-Snecma objects Land ladvantages. will be ailjparent to thoseskilled in the 'l'a'rt uponxa' full understanding of 'the 'constructionGand .oper-'- forethe'purp'ose fexempliiication, f 'lout-'it willof-fc'ou'rse -be `a'p'l:\1ef.;iatedthat the invention .is susceptible ofembodiment finother structurally modifl'edgltorms': 'coming equally the#scope 'rief-i2 la'eifrerentffsidelvview efythe same the hollow interiorof the main frame 10 below' -mountedin-the'seconderyl'irarne `12. 'Thecan rierillesupports two electric 'motors :114 and 15,

f' which` motors 'aref's'ecred ftothe carrier at dia-v metically'opposite sidesfof the latter with their axes `mirallelf'to 'tlxeltofVthe barrier; "The armature shaftsffoff the 4motors lconstitute- #arbors11iv 2en therapie-r table '11,- andthefherizon-a erwin rumana win raise'or -lwer theblpclezegg The secondary vtrainey 12 iis' "ofifskeltons'liker "Ihey mounting fori :tliefsecondary ,':Erarrie-y 12 consists of a pairof spacedarcuate#membersl 2=1con .the sides`of'fsuchCframeawhichwfrestfin a pair, tof :correspondingly:shaped'i'seatsii22 in :the sideszfof the:l ina-in ,iframe 110.5::The:airis-.of'x'zxtva'f-` a5 turevofzthe members 21 rand? 'seatsw22saflocated on; the previously; describedline'. .fof iint'erseetion of:theA uppermostsaw with kthe top of "lthe/table, and-,f:"wh'en `the"secondary iframe :12 .isftilted-f the'fmain frame ltoichangefthecuttingifangle, the:meritibersl 21 will slideinf'athe `seatsl 22;r-ma'in taining in fall positions there'oftla stable suspend sion for?the secondary iframe; u'I-hearcuate:supporting members 21y vare Aso'shaped with respect tothe seats 22 asto pre-ventI eithertup anddown orvsidewisemovement of the same. The Vtilting :movement fof ffthesecondaryframe which is yIoca'ted'l at one' isidev of the mainframe 10: r The-handWhe'el-.ZB fis' secured to fa' sha1/1x24v which is journaled'i inthe sides l'of th'eymain frame. 'Ihe shaft 24 carries a bevel gear{25which"lm'esh'esl with affsimilarvfgear 26 Ionthe pper-hendo'i 'allongfrd'o'w'in'ivardly` `:extending srw 27. "The serew "2.'Zf-isVjo1'irnaledffafdfjaeent to turn about the" shaft 24,'1 and passes'through a threaded'fbloekezg which fispivetallymounted in arexte'nson30 ony one end.y ofthe A'secondary "fr-'an 12.1' Theblock '29 provides'a'fl'otin'g 'supi port f or the lower portion of the screw 27.11

Whenl the? hand `Wheel' 23 isi' rotated, thescrw dependingupo'n' thef'direction-'of 'ijot'ationfth by 'sliding the members'fZ'lfi the' seats'22.-N The angleJK of thef'uppef 4salvi' Witl'ifrespect'fto vthe tableisindic'ated at all times by apentr 31' on'onef of thefmernbers 21'wh'ich overl-ies `fa.' properly 4 calibrated; scale `3'2--on""the"'s'ideffthe'm nl frame;

construction in order to accommodate the fear# rier l3,"a",ndisprovidedjatone end-thereof,"-vvit`h an-outspread e'ndwall 33 whichforms'ffa. clos fdr 4'the corresponding ena of fthe" main The-Wall"33sha-pedgto 4for'rifija semi sawdustV collector- V34 below the saWsf--Whclectorrexhaustsfthrough atarigeritial Bottom lit 'I'he carrier 13isrotated to revolve eitherhsaw into cutting position by means of a handwheel Y 44 which is similar to and is located atone sid of thepreviously -described handlheelZ'SiffIihe' hand wheel 44, instead ofy.being, .supp stationary mounting, is n which extends through anvarcuate'sl side wall of the .main fratrie lqhand isrjournale orted inva snaft in bearings on the secondayifrarnem;f5 The shaft 45 ispositioned in spaced parallel; elvajaion;` to the worm shaft I43 and iscoupled to the latter by a: chain 4'7.f,whicl1;is trained oversprockets'. 48 and:49.onat1'ielshafts.izitja'1:1 :1f gz; Y

Theielectric motors ..14f-1and 15 are connected respectively` l to two;Ysets of, contact elements 50 and-'511, whi'chelenentsare mounted indiametri callyiopposite positions .on the' periphery of.; aninsulatedfftcylinderliZf'which isr secured tothe necle39.v of "theAcarrier. :beyond-the worm; gear. 41. The. contact elementslfor themotorof whichever savwrhappens to' bein.f,c utting. position f-,engagewith-ta; lset .of .correspondingly larranged spring contact fingers53l1onxa'block 154 which is mountedonthe secondary. frame 12 directlybeneath thezcylind'er 52..;1The contact lngers 53 arefof 1vcoursefconnectedr. with thecurrent supply. vAs

soon as either sawv isloweredl out of cutting position, thei-:contactIelements connected withxfits motorf.,wi1l: move; rout of engagement iwith the contacti'fingers. The motori of whichever `saw happens to:beginvcutting position maybe started or stopped by shown), *t.The.;.double, tilting. arbor ,saw benchV permits the Work4 .to-mbekepiifat; all times in; a `horizontal means ,of aI suitable switch (notpositionion thevtable regardless of` the angle at whichthe workis to becut. By merely turning thehand` wheel 23,y the machine; oai-inthe.Setifor any desired angle. anduby merely turning 4the hand Wheel.44,ft'hemachine-gcan be changed t from across eutsaw to airin saw; orvice veniny Iclaim: i f Y doubletiltingvv` arbor comprising` a main.frame a l flat horizontal Yworksupporting table thereon, provided withVa; slot `for the. rerg ception of a, tilted saw, a secondaryirametiltably lmounted* within the `main `frame, below the table` onza centercoincident with the top o fvgthe tlnblefntthe location of vthe Slotincarrier rotateblyjinoiinted on the Secondary framestwofsnws rotatablymounted in the carrier at opposite sides ofthemlattengmeans securedtovthe carrier for 4 rotating n the vvvsaws, lmeans for rotating thecarrier `to bring either ,saw` into the slot yintoY editing positionwitnreepeottothe. ton vof :the table,eandlm`eans for tilting thesecondary. frame to'lgivethe desired cutting angle to v`thesa .w.

, r2.7"A double'tilt'ing arbor fsarv, comprisingE ai,

the carrier to bring either saw with its associated motor into cuttingposition with respect to the' slot in the top of the table, and afloating screw for tilting the secondary frame to give the desiredcutting angle to the saw. y

3. A double tilting arbor saw, comprising a main frame, a horizontalwork-supporting table thereon provided with a s105101-,.thereception ofa' tilted sewn@ ,Seconden niimettesbb'inounted within the main framebelow the table, a carrier rotatably mounted in thesecondary frame, twoectric motors secured to the carrier at oppositerfs'ideSof-lthelatter,saws connected with the means Iorgrotating the carrier to bring itsassociated motor into cutting A I `othe slot in the top of the l table,and*l means I nr tilting the secondary vframetoegiv'ethedesiredllcutting angle to the saw, said A,maigrirrame beingprovided below the table with arcuate seats which are concentric withthe pivotal axisfl of th'eL secondary 'gimme-.fandesaid secondary iframebeing i; provided withl arcuate members forrsliding coactionfwithetheseats@V i' y ,.4; -A :'.rdouble tilting 'vfarbornsaml comprising; amain' frame ,n ajhorizontalwork-.supportingtabl'e thereonfprovided witha slotdor. the reception of. Aa .,-tilted. zsaw, a nsecondary; iframe I.ftiltably mounted 4 within the main. frame below ,the stable,`af-carrier .rotatably mountedron 4thei.icooncloni,-

frnmeitwo. electric. mOtQrssecuIed tothe- ,carrierv the saw, separate,electrical contact rmeantsvffor eachrmotor mounted onthe carrier forrotation therewith,` and other; electrical,contaotA adapted tobeconnected with a source; o current and mounted `on the. A`secondarytranne, .in esposte i separate tion..r to. be engaged -fby1, either..0fSaid electrical contact-meanS`-; a giftALdoubletiltingY arbor.moomprisin main frame, a horizontal.wprkgsupporting able Ythereonprovidedrlwith a slot torfthe :receptio ofatiltedsewta'.seeondarynnxnetiltnbly ino ed within; the mainframe below.-,tnetableta terrien rotatably mounted on the secondary franietwq 'telectric motors .secured ,toztneeerrier at opposite sides of the latter,saws connected withlfthemotors, a henriWheel.x ionrnoledgonttheeeoondnrtV frnrneland;connectediv withl the; `terrien; ,fot rotating thelatter to bring either saw with n associated motoninto o* cuttingposition with respoot .to the slot iii-:thor t0n.. of .fthe tablet: end@secondv handtwheel iournnled on .the .Indio from@ adiacentathe niietmentioned` hands; heele-and; conneotedr-withifthej seoondaryfzifimthelatterto sive thedesired Aeiittinsenel l. :t f "1:1" 'Lf''ol-.m n t'2"' 6.,Adoub1e tilting/1; arbor new. .comprising fn main freine, ahorizontal ,work-Supportinstnble thereon provided Witnfselotiforthereoien ion-of; etilted sawf e -lSecondarytraine,tiltnblinmountedwithin the mainJraxne-,below tl'leitablefay carrier,.- rotatablyvmountedonthe vsecondary frame, two;

on morersaws rotatablyI mOfunted; in, the ,earnerY spaced relation.to-each, otherra piurelit .otsaw-f drivingA .l means o also. i mountedinf li. the: means lfor riotetinefthe cornetto brins Simeone.'particular .sew'into cutting: nositionnithIeeneot;

to` the slot. inthe toploil'the -tebleinnd menne;

for tilting. the secondary' ironie., sired cutting angle to ythe sate.A

give th' def-f` '7. A double tilting arbor saw, comprising a main frame,a flat horizontal work-supporting table thereon provided with a slot forthe recep' tion of a tilted saw, a secondary frame tiltably mountedWithin the mainframe below the table on a center coincident with the topof the table` means for tilting the secondary Aframe to give the desiredcutting angle to the saw, said main frame being provided at oppositesides thereof with upwardly curved arcuate seats, which seats areconcentric with the line of intersection be- Y tween the slot and thetop of the table, and

said secondary frame being provided at oppositel l sides thereof withcorrespondingly curved members which shiftably fit within the seats,whereby to provide a stable support for the'secondary 10 frameregardless of the position into which the latter is tilted.

GUSTAVE T. JOHNSON.

